The Globe and Mail reports in its Wednesday, April 15, edition that last week, Anthropic announced the Claude Mythos Preview, a powerful artificial intelligence model for finding and exploiting software vulnerabilities. The Globe's guest columnists David Lie and Bruce Schneier write that due to its potential risks, access is limited to about 50 organizations, including Microsoft, Crowdstrike, Apple and Amazon Web Services, under the Project Glasswing initiative. The announcement was accompanied by a barrage of hair raising anecdotes: thousands of vulnerabilities uncovered across every major operating system and browser. Mythos was able to weaponize a set of vulnerabilities it found in the Firefox browser into 181 usable attacks; Anthropic's previous flagship model could only achieve two. This is, in many respects, exactly the kind of responsible disclosure that security researchers have long urged, say the guest columnists. And yet the public has been given remarkably little with which to evaluate Anthropic's decision. We have been shown a highlight reel of spectacular successes. However, the guest columnists say they "can't tell if we have a blockbuster until they let us see the whole movie.